Inventor

Frederic J. Kahn

Inventor

Palo Alto, CA, US

Overview

12→

Patents

1977–1993

Patent span

Physics

Primary field (CPC G)

Patents· 12 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G02Fprimary

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein38%

G03BApparatus or arrangements for taking photographs or for projecting or viewing them19%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices13%

G11BInformation storage based on relative movement between record carrier and transducer13%

C09KMaterials for miscellaneous applications, not provided for elsewhere6%

G02BOptical elements, systems or apparatus6%

G06KGraphical data reading6%

PatentTitleYear

5,260,720'Image formation system'1993 5,140,448'Apparatus for and method of operation of smectic liquid crystal light valve having scattering centers'1992 5,138,368'Fabrication of printed wiring boards by projection imaging'1992 5,116,110'Partially coherent optical system with scattering type object'1992 5,085,506'Apparatus and method of forming and projecting high precision optical images'1992 5,080,467'Biphenyl derivatives for photostabilization in pulsed optical darkening apparatus and method'1992 5,056,895'Active matrix liquid crystal liquid crystal light valve including a dielectric mirror upon a leveling layer and having fringing fields'1991 4,969,734'Apparatus and method of forming and projecting high precision optical images'1990 4,818,098'Apparatus and method of forming and projecting high precision optical images'1989 4,405,993'Liquid crystal disc memory system'1983 4,396,997'Liquid crystal information storage and retrieval system'1983 4,059,340'Doped liquid crystal display device'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to BELL TELEPHONE LABOR INC (1)· patent assignee history

1977–1993Based in Palo Alto, CA, US· patent location history

1983Patents assigned to HEWLETT PACKARD CO (2)· patent assignee history

1989–1992Patents assigned to GREYHAWK SYSTEMS INC (8)· patent assignee history

1993Patents assigned to SHARP KK (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GREYHAWK SYSTEMS INC	8	1989–1992
HEWLETT PACKARD CO	2	1983
BELL TELEPHONE LABOR INC	1	1977
SHARP KK	1	1993

Locations

Location	Patents	Span
Palo Alto, California, US	12	1977–1993